﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Ex
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                bla b = new bla();

                b.bla2();
            }
            catch (Exception ex)
            {
                throw new Exception("", ex);

            }

        }
    }

    public class bla
    {
        public void bla2()
        {
            try
            {
                bla3();

                throw new Exception();
            }
            catch (Exception ex)
            {

                throw ex;
            }
        }

        public void bla3()
        {
            List<string> bl=null;
            var d=bl.First();
        }
    }
}
